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Plenty of movies and TV shows have poked fun at the unlikeliness of a Cubs World Series championship — Rookie of the Year, Parks and Recreation, etc. — but no movie is as associated with a Chicago win as Back to the Future Part II, in which the Cubs sweep Miami in five games.

Now, a year after Part II’s prediction was supposed to take place, the Cubs have finally done it. And Marty McFly himself is sending his congratulations.

Michael J. Fox congratulated the Cubs on Twitter, where he paraphrased his time-traveling character by writing, “Only off by a year, not bad. Congrats Cubs. This is so heavy.”

Only off by a year, not bad. Congrats @Cubs. This is so heavy. #FlyTheW

The 1989 sequel predicted that the Cubs would end their century-plus drought in 2015, beating the fictional Miami Gators. This year’s Cubs win joins the list of other Part II predictions that came true, including hoverboards, self-lacing shoes, and drones. (Others, like flying cars and Jaws 19, will probably take a few more years.)

“I’m from St. Louis originally,” he said at the time. “I’m a big baseball fan. You grow up in St. Louis, you automatically become a Cardinals fan. And of course I always followed the Cubs because how could you not? With the Cubs folklore of being the lovable losers that never get there, it was just a natural joke to say, ‘What is the most absurd thing that you could come up with?’”